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It is said that the eyes are the windows to our soul（灵魂）.
First, you have to pay more attention to your diet.
Second, you must have regular and sound sleep. This relaxes the eye muscles and gives them the rest they need. Sleep can help the body repair its tired tissue（组织）.
Last, you should treat your eyes correctly. For example, if you get something in your eye, don’t start rubbing（揉）it. Rubbing is harmful to your eyes. Don’t read or write in poor or bright light because it can cause eye tiredness.
China has also taken steps to protect the students’ eyesight, such as larger printing in students’ textbooks, at least two hours’ outdoor activities a day, regular eyesight checking, less time on e-books and so on.
| A．Eat more fresh fruit, vegetables, fish, eggs and milk. |
| B．Next, it’s necessary for you to exercise your eyes every day. |
| C．To have healthy eyes, you have to look after them properly. |
| D．You should sleep for at least seven to eight hours every day. |
| E．Then, it’s important to spend more time walking outdoors. |
| F．Remember to wear sunglasses to protect your eyes from sunlight. |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
